Rolling-mill



(No Model.)

F. W. STAMMLER.

ROLLING MILL.

Patented Dec. 27, 1887..

INI/EN TOR.

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UNITED STATES PATENT OFFICE.

FRED W. STAMMLER, OF JOHNSTOWN, PENNSYLVANIA, ASSIGNOR TO THE OAMBRIA IRON COMPANY, OF PENNSYLVANIA.

ROLLING-MILL.

SPECIFICATION forming part of Letters Patent No. 375,657, dated December 27, 1887.

Application tiled November 23, 1887. Serial No. 255,971.

To @ZZ whom, 'it' may concern.-

Be it known that I, FRED W. STAMMLER, a citizen of the United States, residing at Johnstown, in the county of Cambria and State of Pennsylvania, have invented certain new and useful Improvements in Rolling-Mills; and I do hereby declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to 1o which it appertains to make and usethe same.

My invention relates to mechanism for handling the piece of metal being rolled and transporting it successively from pass to pass of the rolls of a three-high train, as will be hereinafter fully described.

My invention consists in rising and falling feed-tables and means for operating them; and the main object of my invention is to greatly simplify the mechanism used to operate these 2o tables.

Referring to the sheet of drawings which is annexed to this specification and forms part of it, Figure 1 represents a longitudinal vertical section on the line A B C D E F of Fig. 2.

Fig. 2 represents a transverse vertical section on the line G H of Fig. l.

In the description which will follow like characters of reference will refer to like parts throughout.

1 represents an ordinary stand of three-high rolls, which need no description, except that they are designed to revolve in the directions indicated by the arrows.

2 and 3 are the feed-tables, upon which are 3 5 supported the feed-rollers 4.

5 are paired rock-arms of equal length. Each of the rock-arms are separately pivoted to tables 2 and 3 at 6, the other end of the rock-arms 5 being attached in pairs to the 4o rocleshafts 7, one of the pair being attached to each end thereof. Near the centers of each of the rock-shafts 7 is attached another roekarm, 8, the other end of the rock-arm 8 being pivoted at 9 to one and the same long connecting-link 10. The link 10, for convenience of manufacture and transportation, may be r'nade in parts and connected as shown at 11, Fig. 1, or, to avoid bifurcating levers 8, the link l0 may be made as twin links, as shown (No model.)

in Fig. 2. However, it performs its function 5o as a complete and united bar.

l2 is a bifurcated link, one end of which is pivoted to the pivot 9 of one of the rock-arms 8, and the other end of which is pivoted at 13 to the cross-head of a hydraulic or steam motor, 14;. The lengths of rockarms 8 are equal each to each, and the distance between the supporting ends of any two is equal to the distance between their swinging ends. They therefore are maintained parallel in all posi- 6o tions. Likewise the rockarms 5. are parallel to each other in all positions; and, as they are of equal lengths each to each, the rising and falling tables are always maintained parallel to all positions of themselves, and as the rst position shown in full lines is a horizontal one, it follows that the tables 2 and 3 will always be horizontal, no matter how much. they may be raised.

Ifpressure be applied to the motor 14., so as 7 to move it so that its cross-head occupies the dotted position, then will all other parts of the mechanism occupy their dotted position. The full lines represent the eXtreme lower position, and the dotted lines the extreme upper position, of the rising and falling tables 2 and 3.

It will also be understood from the foregoing description that tables 2 and 3 rise together and fall together, so that they always lie in the same horizontal plane.

It will be seen that table 2 is closer to the rolls in its lower position, this being the result of the location of the rock-shafts 7 below the level of the pivots 6, and the consequent angularity of the rock-arms 5. Likewise it will be seen, and for the saine reason, that table 3 is closer to the rolls in its upper position. From the direction of revolution of the rolls it is manifest that the lower position of table 2 is its feeding-in position; also that the 9o upper position of table 3 is its feeding-inl position. Therefore both tables are closer to the rolls in their feeding-in positions.

15 is an idleroller journaled in brackets attached to the housing of the stand of rolls 1, the oice of this roller being to bridge over the space between the rolls and table 2 when table2is in its fecding-outorreceiving position.

.Y to perform a like offcein connection with table 3. Feed-rollers 4 are driven by any suitable system of gearing.

17 represents castings which form the bearings for rock-shafts 7, 1S being a shield fitted to casting 17 to keep the scale from the working parts of the mechanism, as clearly shown in the drawings. v

Having describedthe several parts of my invention, I will now, for further clearness, eX- plain the working thereof.

The tables 2 and 3 being in Vtheir lower position, a. hot bloom is deposited on' table 2. The feed-rollers 4 are then actuatedto feed it into the rolls, emerging from which it is received on table 3, roller 16 supporting it in its passage from the rolls to said table 3. The motor 14 being put into action, the tables, through the described mechanism, are raised to their upper position, table 3 thereby approaching the rolls and table 2 receding from them. The rollers 4 are now actuated to feed the piece being acted upon into the rolls, emerging from which it passes over the supporting-roller 15, and is received on table 2. The tables are then lowered and the operation repeated. Suitablepush-over devices are used to move the piece being rolled sidewise from pass to pass; but as they form no part of this invention, they are neither illustrated nor described'. Automatic rolling-mills, as heretofore constructed, are much too complicated to be successful, the great cost of maintaining a complicated system of mechanism, when exposed to the action of waterand roll-scale, more than overbalaneing the advantages to be derived from them, and much destructiblc mechanism is comparatively inaccessible in deep pits and much exposed to falling scale. Sliding parts are also used in this connection,

which,from their working condition, are hard to lubricate and protect from damaging wear; but by discarding slides Vand reducing the lever system to its simplest form, I am enabled to shield the wearing parts from scale and also to use a shallow pit, and the actual wearing parts in the pit are reduced to five pivoted connections, and the pressure on the sides of these pivots is always in the same direction.

In rolling-mills with rising and falling tables it is found desirable to have the piece being rolled pass over a rigidly-supported roller as it emerges from the rolls, for the rolled piece sometimes becomes bent down at the advancing end, and as the piece is forcibly expelled from the rollsthis bent end, striking movable mechanism, is very destructive to it; but the objection to using such rigidly-supported roller in rolling-mills as heretofore constructed, in which the tables were at the same distance from the rolls while receiving as when feeding in, has been that too much space intervened between the rolls and the feeding-tables when in their feeding-in position, thereby necessitating an intervening roller, which, if an idle roller, cannot assist to enter the piece being rolled into the rolls, and, if a constantly-driven roller, it resists drawing back the piece being rolled, in order to project it again against the rolls if they should from any cause fail to bite the first time. All of these objections I am able to avoid by having the tables move so that they will b e closer to the rolls when in their feeding-in position than when in their receivingposition. Another advantage I gain by this movement is that I thereby use shorter tables, for if a short table is close to the rolls while receiving the piece being rolled, the velocity at which the piece is expelled from the rolls issufcient to throw the piece clear over the table onto the oor, even though the feedrollers be stationary or revolved against the expelled piece.

It is obvious that minor changes may be madein this described mechanism. The rockarm 8 may be made in pairs, as twin arms, and may be continuations of rock-arms 5, Vor only one rising andfalling table, such as is described, may be used,some other form being used on the other side of the rolls. I therefore do not restrict myself to the exact construction described herein; butY What I claim as my invention, and desire to secure by Letters Patent, is-

1. The combination of a stand of three-high rolls, rising and falling feed-tables, and rockarms pivoted directly to the rising and falling table to actuate and guide the saine without anyintermediate links or conncctions,substantially-as and for the purpose set forth.

2. The combination of a stand of three-high rolls and risingY and Vfalling horizontal feed- 'tables which approach the rolls while moving to their feeding-in position and recede from the rolls while moving to their receiving position, substantially as and for the purpose set forth.

3. The combination of a stand of three-high rolls, a rising and falling feed-table, paired rock-arms pivoted directly to the said rising and falling feed-table, rock-shafts having attached to each end one of each pair of rockarms, a second set of rock-arms attached, one each, to the aforesaid rock-shafts, the swinging end of these last-mentioned rock-arms being attached through connecting mechanism to the same motor, substantially as and for the purpose set forth.

4. The combination of a stand of three-high rolls with a rising and falling feed-table pivotally supported on rock-arms which are attached to rock-shafts, the pivoted ends of the said rock-arms being at all times above the horizontal plane passing through the rockshafts, substantially as and for the purpose set forth.

In testimony whereofI affix my signature in presence of two witnesses.

FRED WV. STAM MLER.

Witnesses:

ALEX. HAMILTON, Jr., JAMES ORANsToN.

IOS) 

